Valve rocker arm refacing machine



T. SWINDLE VALVE ROCKER ARM REFACING MACHINE April 15, 1947.

Filed Feb. 1, 1945 1N VEN TOR. ,ywzzzdle ITTOAIVEHS" lower threaded end Patented Apr. 15, 1947 UNI TED STAT-ES PATENT OF F 1 CE VALVE ROCKER REF-ACIN G MACHINE Theodore-Swindle, Atlanta, Ga.

Application February 1, 1945, 'Serial No. 575,615

1 Claim. 1

This invention relates to la grinding machine designed for use in refacing 'valve rocker arms of internal combustion engines.

An important object of the invention is to providea machine of this character wherein'arocke'r arm assembly may be mounted thereon, and will be supported Vertically, to the end that the faces of the rocker arms contacting with the grinding wheel will be in full view of the person using the machine, to insure accuracy in the refacing operation.

Still another object of the invention is to provide a machine for refacing rocker arms which, because it is supported vertically, will reduce the space required to mount the machine on the usual work bench, over known rocker arm refacing machines of the horizontal type in common use.

A further object of the invention is to provide a rocker arm refacing machine embodying a main support and an adjustable bracket on the main support on which the rocker arms are mounted for refacing, the bracket and arms being adjustable to insure the grinding of the rocker arm faces, parallel with the rocker arm shaft, and on a true radius.

With the foregoing andother objects in view, which will appear as the description proceeds,

the invention consists of certain details of con- 1 struction and combinations of parts hereinafter more fully described and pointed out in the claim, it being understood that changes may be made in the construction and arrangement of part without departing from the spiritof the invention as claimed.

Referring tothe drawing:

Figure 1 is a side elevational View of a grinding machine constructed in accordance with the invention.

Figure 2 is a front elevational view of the machine.

Figure 3 is a sectional view taken on line 33 of Figure 1.

Referring to the drawing in detail, the device embodies a main supporting bracket 5, which is provided with openings 6 for the reception of securing bolts for securing the machine to a work bench or other suitable supporting surface.

At the lower end of the bracket is an arm I, which extends 'rearwardly therefrom, the outer or free end of the arm 7 having an opening for the reception of the lower end of the vertical rod 8 that is secured within the opening of the arm by means of the nut 9 operating on the of the rod.

Extending upwardly from the upper end of the main supporting-bracketi is an arm UL-which has its upper "end "curved rearwardly in .direct alinement with the arm '1, where it is formed withan opening to receive .the upper end of the rod 8, as clearly shown by the drawing. The upper end of the rod 8 is secured within the opening of the arm ID by means of the nut II.

The arm I!) is also provided with a bearing l I, in which the shaft 52 operates, the shaft I2 pro viding the supporting shaft for the grinding wheel [3. A pulley indicated at H! is also mounted on the shaft l2, and accommodates a belt (not shown) which transmits movement to the shaft I2 and grinding wheel l3, from a motor or suitable source of power (not shown).

The support for the rocker arm assembly embodie the tubular member l5,-which is mounted on the shaft 8 for rotary, as well as vertical, movement. At the lower end of the tubular member I5 is a collar 15 that is held in position on the rod 8 by means of the set-screw ll. Thus it will be seen that due to this construction, the tubular member may be adjusted around the rod 8, as well as longitudinally thereof, to bring the rocker arm supported thereby into proper grinding relation with respect to the grinding wheel I3.

At the ends of the tubular member l5 are inwardly extended arms 18, between which the rocker arm assembly is held. These arms l8 are formed with threaded openings for the reception of the adjusting screws I 9 that are formed with tapered heads 29, which fit in the ends of the hollow rocker arm assembly shaft 2|.

Lock nuts 22 are positioned on the set screws I 9 and are adapted to engage the arms it, setting up a binding action to lock the adjusting screws in their positions of adjustment.

The rocker arms in the present showing are indicated by the reference character 23, certain of the rocker arms being shown as moved to a position for refacing. The rocker arms 23 are held in spaced relation with respect to each other by means of spacing sprin s 24, positioned between the rocker of the assembly for exerting pressure on the rocker arms and restricting movement of the rocker arms longitudinally of the supporting shaft.

In operation, the valve rocker arm assembly is positioned between the arms 18 of the support and are secured in position by adjusting the set screw IS in a manner as described. The rocker arm to be refaced is now moved into contact with the side face of the grinding wheel [3, and the tubular member is now'rotated on the rod 8 to the proper position. By supporting the rocker arms in thisposition during the refacing operation, the rocker arms will be ground parallel with the rocker arm shaft.

By adjusting the tubular member vertically, the rocker arms of an assembly may be successively refaced.

What is claimed: A machine for refacing rocker arms of an internal combustion engine, comprising a vertical bracket adapted to be secured to a support, a grinding wheel mounted on the bracket, a horizontal arm extending forwardly from the bracket, an upwardly and forwardly extended arm connected with the bracket and having an opening in its free end disposed in vertical alignment with the horizontal arm, a rod connecting the upwardly extended arm and the horizontal arm, a rocker arm assembly support comprising a tubular member mounted on the rod for rotary and vertical sliding movement, upper and lower spaced parallel arms extending inwardly from the tubular member, means for removably securing a rocker arm assembly between the arms of the tubular member, whereby the rocker arms under treatment are supported in parallel relation to the side faces of the grinding wheel, and means for securing the tubular member in its positions of vertical adjustment on the rod.

THEODORE SWINDLE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

